I found an improved command for making brown #noise with #sox on #linux (often builtin).

play --rate 192k -b 24 -c 2 -v 70 -n synth brown

dual channel brown noise with 192kbps (lol) and 24 bit sound.

the dual channels are actually a pretty noticeable improvement, the bitrate and bit depth probably not so meaningful 😂

so much better than white noise to sleep to and maybe even better at covering traffic and talking sounds.